





from typing import TYPE_CHECKING

from ...utils import OptionalDependencyNotAvailable, _LazyModule, is_torch_available


A       :   Dict					= {'''configuration_timm_backbone''': ['''TimmBackboneConfig''']}


try:
					if not is_torch_available():
										raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
					pass
else:
					A       :   List[str]					= ['''TimmBackbone''']


if TYPE_CHECKING:
					from .configuration_timm_backbone import TimmBackboneConfig

					try:
										if not is_torch_available():
															raise OptionalDependencyNotAvailable()
					except OptionalDependencyNotAvailable:
										pass
					else:
										from .modeling_timm_backbone import TimmBackbone

else:
					import sys

					A       :   int					= _LazyModule(__name__, globals()['''__file__'''], _import_structure, module_spec=__spec__)




"""simple docstring"""


def      lowerCamelCase_					(   __lowerCAmelCase							)				->   list:




						'''simple docstring'''



						if len(__lowerCAmelCase							) <= 1:
												return [tuple(__lowerCAmelCase							)]

						lowerCamelCase__   =[]

						def generate(__lowerCAmelCase  ,       __lowerCAmelCase							):
												lowerCamelCase__   =[0] * n
												res.append(tuple(__lowerCAmelCase							)							)

												lowerCamelCase__   =0
												while i < n:
																		if c[i] < i:
																								if i % 2 == 0:
																														lowerCamelCase__   , lowerCamelCase__   =arr[i], arr[0]
																								else:
																														lowerCamelCase__   , lowerCamelCase__   =arr[i], arr[c[i]]
																								res.append(tuple(__lowerCAmelCase							)							)
																								c[i] += 1
																								lowerCamelCase__   =0
																		else:
																								lowerCamelCase__   =0
																								i += 1

						generate(len(__lowerCAmelCase							)  ,       __lowerCAmelCase							)
						return res


if __name__ == "__main__":
	a				=input('Enter numbers separated by a comma:\n').strip()
	a				=[int(item) for item in user_input.split(',')]
	print(heaps(arr))


